Boodle . — Anatomy of the Schizaeaceae . 421 
Fig. 39. Anemia mexicana . Part of transverse section of stele, i. ph., inner 
phloem, x 140. 
Fig. 40. Anemia Pkyilitidis. Part of transverse section of one of the steles in 
the stem. i. e., inner endodermis ; i. ph ., inner phloem, x 140. 
Fig. 41. Anemia coriacea. Diagram of stele of rhizome, just below node. 
group of endodermal cells. x 90. 
Fig. 42. Anemia coriacea . Diagram of stele at node, x 90. 
Fig. 43. Anemia coriacea. Diagram of node. 1 . t., leaf-trace, x about 75. 
Fig. 44. Nephrodium Thelypteris. Half petiolar bundle, showing thick-walled 
sieve-tubes, x 40. 
Fig. 45. Adiantum trapeziforme. Part of petiolar bundle, f, fibres, x 390. 
Fig. 46. Trichomanes Prieurii. Fibre in bundle of petiole, x 390. 
Fig. 47. Trichomanes radicans. Two sieve-tubes and one pericyclic cell from 
rhizome. s. } sieve-plates; n., nucleus of parenchyma-cell, x 390. 
Fig. 48. Trichomanes radicans. Three sieve-tubes from rhizome, s., sieve- 
plate ; e., end-wall, x 390. 
Postscript. 
In the lower part of the petiole of Anemia coriacea the bundle is of 
the type found in other species of Anemia , e.g. A. aurita , but in the 
upper part of the petiole it divides into two, one bundle having 
a V-shaped xylem, and the other, which is smaller, having a straight 
band of xylem. Prantl’s description ('81, p. 26) of the petiole of this 
species probably refers to the region where the division of the bundle 
is incomplete. The division of the petiolar bundle appears to be an 
unusually early separation of a bundle for one of the first pinnae of 
the leaf. 
Two papers not cited in the list of Literature must be mentioned 
here, viz. : — 
Scott, ’ 94 : Recent work on the Morphology of tissues in the Higher Plants. 
Science Progress, vol. i, and 
Tansley, ’96 : The Stelar Theory. Science Progress, vol. v. 
In these papers several views are discussed or brought forward, which have 
been adopted in the present paper (see the section on the Stele, p. 403). 
